Type-writing machine.



, PATENTED JULY 7., 1903;4

M. S.BYLAR. TYPE WRITING MACHINE. l.APPLICATION FILED FEB'. 18, 1903.

2 sums-SHEET a.

' N0 MODEL.

A TTOHE Y i UNITED STATES" PATENT Patented July 7, 1903.

OFFICE.

MATTHE Enna-jor NEW YORK, N. Y., AssieNoR To ELLroTraHATcH soon`TvrEwRiTEE-ooMPANY, A ooEPoRATioN oF NEW YORK.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent N ou 732,840, dated July 7,1903. Application tied Febuary 1a, 190s. serial No. 143,560. (No model.)

.To all whom, t may concern.-

Be it known thatLMATTHEw S. EYLAE, of New York city,"county of New York,and

`State of New York, have invented a new and useful Improvement inType-Writing Machines, of which the following is a specication. Y

My inventionhas reference more particu- Y. larly to type-writingmachines wherein a flat platen is employed to `sustain the paper beneathan overlying writing mechanism ar ranged to print in a downwarddirection thereon and to shift horizontally for letter and linespacing--such, for example, as theElliott da Hatch machine of commerce,represented as Yto its general organization in Letters Patentof theUnited States N o. 620,125. It is desirable to adapt these machines tofprint two alphabets of capital letters, one havin ga large or broadfaceV and the other a smaller or narrower face. When these two faces areused in the one ma`chine,"it is desirable to have a feed mechanism whichmay be instantly adj usted to feed the carriage or printing mechanismforward uniformly step by step the 'distance requiredfcr the wideletters r uniforinly step `by step for a smaller distance suitable tothe narrow letters. i

To this end I-combine with the letter-feed f 3 mechanism in a machinehaving an alphabet "of wide characters and 'a second alphabet of narrowcharacter devices which may beinv stantly throwninto or out of action'tocontrol the distance `which thecarriage advances between the printingofone letter and the next. In all parts exceptthe feed mechanism themachine may be of ordinary construction.

In the drawings, I have represented my improvement as applied to anElliott da Hatch machine, the drawings being limited to the .feedmechanism-and adjacent parts necessary to an understanding ofI itsaction.

Figurelisaperspective view of therear part of a Inachinewith my improvedfeed devices applied'thereto. Figs. 2 and 3 are i rear elevations of thefeed-dogs, feed-wheel, I `and adjacent parts; and Fig. 4 is a verticalcross-section through said parts on the correfigures.

tion by rocking the head through the large type.

i bar G.

spondingly-numbered line of the preceding Fig. 5 is a diagrammatic viewshowing the relative spacin g of the large and small capital letters.

` Referring jto the drawings, A represents the traveling frame orcarriage of the machine in which the series of type-bars B are mountedon pivots at their lower ends and connected with finger-keys, as usual,whereby they are caused to swing downward and print on the underlyingsheet of paper.` There Awill be the usual series of these type-barsarranged in a circle to strike at a common central point, and each barwill be provided at the upper end with the usual rocking head C,carrying two type D and D', one or the other of which may be broughtinto the printing posiusual devices provided for the purpose. One of theletters of the type B is of large size, with a broad face, while theother, having the same character or letter of a dierent series or font,has a smaller and narrower face.' Both alphabets will be composed ofcapital letters. In using the machine, matter will be `printed at onetime entirely from the small type and at another time entirely from theAfter each printing action the carriageshould advance laterally adistance corresponding to the'width of the type in action. This variablefeed of the frame is eiected as follows: The carriage, suitablysupported and guided on rollers, is urged constantly to the left by theusual spring 4connections.' Its advance is controlled by the toothedrack F on the horizontal iixed guide- This rack is engaged by a pinionH,having its horizontal shaft mounted in the carriage and provided with atoothed escapement-wheel I. This wheel is controlled in its rotation bythe two alternately-acting `dogs J and K, carried by the rocker-frame L,mounted to vibrate at rightangles to the direction in which the carriageadvances. The dog J is fixed to the rocker-frame. The dog K is pivotedat 7c to the rocker-frame, so that its upper end which engages the wheelmay vibrate in the direction in which the frame travels. It isacted uponat thelower end by spring k', which tends to throw the upper end forwardout of line with the other dog and ahead of the same in the direction inwhich the machine advances. Thev escapementwheel has a tendency torotate in the direction indicated by the arrow.

In the normal condition of the parts the dog K is in engagement and isheld back by the pressure-wheel somewhat in advance of the fixed dog J,as shown in Fig. 2. When the rocker-frame is actuated by the operationof a finger-key or the space-key, it swings backward, carrying the upperend of the dog K rearward out of engagement with the escapement-wheel Iand at the same time bringing the dog J into the path of the wheel toarrestitsrotation. ThedogKwhenreleased, as stated, is thrown forward bythe action of the spring 7a', as indicated by dotted lines in Fig. 2, sothat when the two dogs are swung forward ed gewise by the rocker-framethe dog J will disengage from and release the escapement-wheel, whichwill turn forward with the pinion and permit the carriage to advance thespace of one letter. The advance is arrested by the dog K, which duringthe forward motion of the rocker and the disengagement and retreat ofdog J is carried in its advanced position into the path of theescapement-wheel, so that the next tooth on the latter acting on the dogK will carry the latter to the right around its pivot 7c until its upperend is arrested by contact with the shoulder on the rocker in itsoriginal position, the dog thus stopped in its vibration serving in turnto stop the wheel.

The foregoing action of the parts is similar to thatof the feed-dogsinthe ordinaryElliott it Hatch machine. The distance which the carriage ispermitted to move by each engagement and disengagement of the dogsdepends on the distance which the dog K turns forward around its pivot,k before engaging the wheel. In Fig. 1 it is represented as swingingforward the distance of one tooth only, so

lthat the escapement-wheel turns one tooth only, allowing the carriageto advance the width of one of the narrow type. If, however, the dog Kis allowed to swing forward,

as shown in Fig. 3, the distance of two teeth,

or, in other words, given a greater vibration, it will advance thedistance of two teeth on the wheel and allow the wheel to turn thedistance of two teeth, the carriagey being permitted to advance twice asfast as in the first instance a distance corresponding to the width ofthe wide type. In other words, the advance of the carriage after eachprinting action is greater or less, according to the distance which thedog K is permitted to swing ahead before rengaging the escapementwheel.In order to control this action, I combine with the dog K an adjustablestop device under the control of the operator. I return the upper end ofthe spring lc above the lower end of the dog K to serve as a stoptherefor to check its vibration, as shown' in Figs. 2 and 3. This end ofthe spring is extended throughl a plate M, mounted to vibrate verticallyaround a pivot-piu N on the yoke under the control of a rod O, connectedat the upper end to a lever P, which is pivoted atp on the carriage andextended at its forward end within convenient reach of the operator andpast a dog or a latch Q, by which it may be locked down at will. Whenthis lever is depressed and fastened down, it holds the plate M in itsuppermost position, permitting the end of the spring or stop 7c' tostand in its uppermost position, as indicated in Fig. 3. The effect ofthis is to permit the extreme vibration of the dog Kv and thecorresponding extreme feed of the carriage. When the lever P isreleased, the plate M is pulled down by the action of the spring 7c andthe upper end of the spring depressed, as shown in Fig. 2, so that itserves to limit the vibration of the dog K, and thus cause the shortfeed of the carriage.

It will be observed that the upper end of the spring is,in fact,sin1plyan adjustable stop to control the vibration of dog K, and it will bemanifest to the skilled mechanic that this stop may be made in any othersuitable form and arranged in any suitable manner, provided only it isadapted to vary the extent of the vibration of the dog K and to besecured in position so that the feed of the carriage will be uniformlyand constantly wide or narrow, according as the larger or smaller facesare called into use.

In operatingthe machine if the large type l are required thetype-shifting devices are adjusted to so control the position of thetypehead C that the large type only will print. At the same time theleverP is locked down, thus causing the dog K to receive the maximummovement, so that the carriage will advance after each printing action aspace appropriate to the width of the large type. When, on the otherhand, the small type alone are to be used, the lever P is released andthe stop permitted to fall, so as to limit the movement of dog K,whereupon the machine will feed after the writing of each sm all type acorrespondingly short distance.

It is to be noted that my invention does not relate merely to a feedmechanism having a variable action, but that it consists in an organizedmachine carrying two distinct alphabets or fonts of type, each adaptedto be used independently of the other, so thatl the writing may beeffected wholly in one face or the other, the machine being adapted tospace uniformly and constantly for all the faces in each alphabet adistance appropriate to the alphabet which is at the timein use.

What I claim as my invention is- 1. A type-writer for producing twodistinct classes of print, comprising in combination an alphabet of widecharacters and a distinct IOO TIO

alphabet of narrow characters, each usable whereby a uniform and narrowfeed is efindependentlyof theother, andaleiter-feed fected when thenarrow alphabet is in use,

mechanism, adjustable to give a uniform and and a uniform and wide feedeffected when 15 narrow feed or a uniform and wide feed, acthe widealphabet is in use.`

` 5 cording as one alphabet or the other is in use. In vtestimonywhereof I hereunto set my 2. In a type-writing machine, a series ofhand, this 13th day of Eebruary, 1903, in the type-bars with rockingheads, an alphabet of presence of two attesting Witnesses.

`narrow type and an alphabet of wide type, one

i of each carried by each type-head, a letter- MATTHEW s' EYLAR 1o feedmechanism, means for varying the eX- Witnesses:

tent of the feeding action, and means for lock- A. G. OLNEY,`

ing the parts, substantially as described,` 1 W. L. DENCH.

